Improvement in scale-beams



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JOHN H. USHER, 0F BUFFALO, NEW YORK, ASSIGNOR TO THE BUFFALO AND NIAGARA SCALE-WORKS (,OBIPABIYXy OF SAME PLACE.

Letters Patent No. 108,654, (lated October 25, 1870.

IMPROVEMENT IN SCALE-BEAMS.

The Schedule referred to in these Letters Patent and making part of the same:

l, Jonx ll. Usnnn, or the. eity ol' lnilalo, in the eonnty of .Erie and State ol" New .Yer-lr, aseignor lo lnn L'rmLo .mn Nmewnw SeALrhlYonn: (lore NNY, ofthe lSame place, have invented a eerlain lmprovelnent inleighing-Smiles, oli whieh lho following is a specification.

)ly invention relates lo lhe manner oi' constructing and insertingthe key commonly employed to lasten ihe. pivot-pin in scale-beams, and seein-e the heam against lateral movement in the snpporling-,roheg and ll. consiste1 ol` a key lormed with npi'nrned ends, in 'omhinaiion with a key-seat ent throng-h the beam apart i'ronr the hole for the reeept'ion ol'the pivot-pin, the ohjeet being to obtain a. greater hearing; in the ker-seat, and to permit the use. of a lzn'e'er key, and the driving' il to ils plzlee indepemlently of the pivotpln.

ln the aceomlmnving drawing Fie-nre l is a sido elevation.

l `ignre ll, in' :1. erosS-seeion of the heamR, in line .r rr.

.lfignre lll is a cross-section of the beam, showing the pivot-pin and stop as arranged therein.

Lilie letters of relerenee designate like paris in each ofthe Iignres.

A is the main heam ol' :my ordinary weighingscale;

B is the pivot-pin 5 (l, the supporting-yoke: and

l), my improved key, arrangedin a key-seat, e, in

the heam nndernealh and separate from the pivot-V hole.

lhe endl of this key are provided with arms d (Z, whieh project upward in Contact with the. edge of' the. pivot.

llne arms, at the point of Contact, are preferably formed with a notch, to receive the edge ofthe pivot, which renders the Connection between them more seenre.

The ends of the key are beveled, as heretofore, so as to hear against the sides of the tvoke and secure lheheam againetlateral movement.

My improvement is more important iorseale-beams ol' large size, which require lone pivot-pins and wide yokes lo seeure lateral steadiness, for it enables -the cross-sectional dimensions o'f the key to be increased in proportion to its length, lie-side the other advantages before enumerated.

(Naim.

l claimtlhe kevl), iol-med with npturned ends (Z al, in conibinntion with the pivot-pin B and separate key-seat e, as hereinbefore set forth.

JOHN H. USHER.

VWitnesses:

JAY HYATT, n JN0. J. RUNNER. 

